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Gold Prospecting
Metal Detecting for Gold
3500 v F1A4 Jack Lange stage 2
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<blockquote data-quote="PhaseTech" data-source="post: 134320" data-attributes="member: 3149"><p>I had a brief play of an F1A4 recently. This one was standard, no mods. Here's a few thoughts:</p><p></p><p>Very stable threshold - seems more stable compared to the Sd2100 from what I remember</p><p></p><p>Very nice signal response - similar to a 2100, better than a 2200</p><p></p><p>Better than expected balance, considering there's 4 x D Cells stuffed in there</p><p></p><p>Audio output is very quiet - putting in a 1/4" socket would be the "must do" mod, and running an external booster or powerful headphones would help a lot.</p><p></p><p>Does pick up ground noises as you'd expect from a pre GPX model, but because the target response is so sharp, ground noises are easy to ID/ignore.</p><p></p><p>Did a quick comparison using a 0.3g test nuggie, in medium ground, against the 5000. The 5000 went a touch deeper but there wasn't much in it, and I did have an 11" mono on the gpx. The 5000 response was much louder, so yeah an audio booster and speaker would he a good addition to the F1a4.</p></blockquote><p></p>
[QUOTE="PhaseTech, post: 134320, member: 3149"] I had a brief play of an F1A4 recently. This one was standard, no mods. Here's a few thoughts: Very stable threshold - seems more stable compared to the Sd2100 from what I remember Very nice signal response - similar to a 2100, better than a 2200 Better than expected balance, considering there's 4 x D Cells stuffed in there Audio output is very quiet - putting in a 1/4" socket would be the "must do" mod, and running an external booster or powerful headphones would help a lot. Does pick up ground noises as you'd expect from a pre GPX model, but because the target response is so sharp, ground noises are easy to ID/ignore. Did a quick comparison using a 0.3g test nuggie, in medium ground, against the 5000. The 5000 went a touch deeper but there wasn't much in it, and I did have an 11" mono on the gpx. The 5000 response was much louder, so yeah an audio booster and speaker would he a good addition to the F1a4. [/QUOTE]
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Gold Prospecting
Metal Detecting for Gold
3500 v F1A4 Jack Lange stage 2
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